Spatially Separated Superconductivity and Enhanced Charge-Density-Wave Ordering in an IrTe2 Nanoflake

Yanpeng Song; Fanqi Meng; Tianping Ying; Jun Deng; Junjie Wang; Xu Han; Qinghua Zhang; Yuan Huang; Jian Gang Guo; Xiaolong Chen

doi:10.1021/acs.jpclett.1c03302

Spatially Separated Superconductivity and Enhanced Charge-Density-Wave Ordering in an IrTe₂ Nanoflake

Yanpeng Song, Fanqi Meng, Tianping Ying, Jun Deng, Junjie Wang, Xu Han, Qinghua Zhang, Yuan Huang^*, Jian Gang Guo, Xiaolong Chen^*

^*Corresponding author for this work

Advanced Research Institute of Multidisciplinary Science

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The interplay among collective electronic states like superconductivity (SC) and charge density wave (CDW) is of significance in transition metal dichalcogenides. To date, a consensus on the relationship between SC and CDW has not been established in IrTe₂. Here we use the Au-assisted exfoliation method to cleave IrTe₂ down to 10 nm. A striking feature is the concurrence of phase separation in a single piece of nanoflake, i.e., the superconducting (P3̅m1) and CDW (P3̅) phases. In the former area, the dimensional fluctuations suppress the CDW ordering and induce SC at 3.5 K. The CDW area at the phase boundary shows enhanced T_CDW at 605 K (T_CDW = 280 K in the bulk phase), which is accompanied by a unique wrinkle. Detailed analyses suggest that the strain-induced bond breaking of Te–Te dimers favors the CDW.

Original language	English
Pages (from-to)	12180-12186
Number of pages	7
Journal	Journal of Physical Chemistry Letters
Volume	12
Issue number	51
DOIs	https://doi.org/10.1021/acs.jpclett.1c03302
Publication status	Published - 30 Dec 2021

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title = "Spatially Separated Superconductivity and Enhanced Charge-Density-Wave Ordering in an IrTe2 Nanoflake",

abstract = "The interplay among collective electronic states like superconductivity (SC) and charge density wave (CDW) is of significance in transition metal dichalcogenides. To date, a consensus on the relationship between SC and CDW has not been established in IrTe2. Here we use the Au-assisted exfoliation method to cleave IrTe2 down to 10 nm. A striking feature is the concurrence of phase separation in a single piece of nanoflake, i.e., the superconducting (P3̅m1) and CDW (P3̅) phases. In the former area, the dimensional fluctuations suppress the CDW ordering and induce SC at 3.5 K. The CDW area at the phase boundary shows enhanced TCDW at 605 K (TCDW = 280 K in the bulk phase), which is accompanied by a unique wrinkle. Detailed analyses suggest that the strain-induced bond breaking of Te–Te dimers favors the CDW.",

author = "Yanpeng Song and Fanqi Meng and Tianping Ying and Jun Deng and Junjie Wang and Xu Han and Qinghua Zhang and Yuan Huang and Guo, {Jian Gang} and Xiaolong Chen",

note = "Publisher Copyright: {\textcopyright} 2021 American Chemical Society",

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doi = "10.1021/acs.jpclett.1c03302",

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T1 - Spatially Separated Superconductivity and Enhanced Charge-Density-Wave Ordering in an IrTe2 Nanoflake

AU - Song, Yanpeng

AU - Meng, Fanqi

AU - Ying, Tianping

AU - Deng, Jun

AU - Wang, Junjie

AU - Han, Xu

AU - Zhang, Qinghua

AU - Huang, Yuan

AU - Guo, Jian Gang

AU - Chen, Xiaolong

PY - 2021/12/30

Y1 - 2021/12/30

N2 - The interplay among collective electronic states like superconductivity (SC) and charge density wave (CDW) is of significance in transition metal dichalcogenides. To date, a consensus on the relationship between SC and CDW has not been established in IrTe2. Here we use the Au-assisted exfoliation method to cleave IrTe2 down to 10 nm. A striking feature is the concurrence of phase separation in a single piece of nanoflake, i.e., the superconducting (P3̅m1) and CDW (P3̅) phases. In the former area, the dimensional fluctuations suppress the CDW ordering and induce SC at 3.5 K. The CDW area at the phase boundary shows enhanced TCDW at 605 K (TCDW = 280 K in the bulk phase), which is accompanied by a unique wrinkle. Detailed analyses suggest that the strain-induced bond breaking of Te–Te dimers favors the CDW.

AB - The interplay among collective electronic states like superconductivity (SC) and charge density wave (CDW) is of significance in transition metal dichalcogenides. To date, a consensus on the relationship between SC and CDW has not been established in IrTe2. Here we use the Au-assisted exfoliation method to cleave IrTe2 down to 10 nm. A striking feature is the concurrence of phase separation in a single piece of nanoflake, i.e., the superconducting (P3̅m1) and CDW (P3̅) phases. In the former area, the dimensional fluctuations suppress the CDW ordering and induce SC at 3.5 K. The CDW area at the phase boundary shows enhanced TCDW at 605 K (TCDW = 280 K in the bulk phase), which is accompanied by a unique wrinkle. Detailed analyses suggest that the strain-induced bond breaking of Te–Te dimers favors the CDW.

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SN - 1948-7185

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JO - Journal of Physical Chemistry Letters

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IS - 51

ER -

Spatially Separated Superconductivity and Enhanced Charge-Density-Wave Ordering in an IrTe₂ Nanoflake

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